My son will not remember me and soon it will be like I never existed
I recently read autobigograhy of Anjeclica Hustons sister called Love Child. Her Mother died in car accident when she was four and she was brought up by John Huston, who then turns out not to be her father.
Her whole life/book was about catching glimpses of her mother. Photos, articles, and letter she wrote to other people. Her most precious photo was one with her mother holding her hand.
Write your son letters but about you and your life, not so much how to live his. This writer struggled through letters to know who her mother was.
where did you go to school, how did you feel about it, on x day, go into detail, give him something to hang on too. This is where Mum went to school, this must be the wall she crashed into on her bike etc. She loved that bike etc
Do scrap book of YOUR life before him too.
Box your guilt and grief, feel it, indugle in it then say enough for today. I will allow myself an hour then put it away until tomorow.